题目内容：

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

Wang Wei and Wang Kun are brothers and sisters．They have dreamed of1.(take) a great bike trip．It was Wang Wei 2. first had the idea to cycle along the Mekong River and finally they 3. (ride) bicycles to travel along the river, 4.source is in Qinghai Province．When it enters Southeast Asia, it travels slowly through hills and low valleys and the plains5.rice grows．Despite the 6.(difficult), Wang Kun and Wang Wei were 7. (determination) to begin their journey at   8. altitude of more than 5,000 metres in Qinghai Province．During their journey, they enjoyed the   9. (continue) change of the weather．At last they reached Dali in Yunnan, where Dao Wei and Yu Hang joined them．The four of them went on10.their great bike trip．